Dr Jenny Svanberg is the Consultant Clinical Psychologist at Forth Valley Substance Misuse Service, Dr Adrienne Withall is a Senior Lecturer and Senior Research Fellow at the School of Public Health and Community Medicine within the University of New South Wales, Prof Brian Draper is a Professor (Conjoint) at the School of Psychiatry, University of New South Wales and Prof Stephen Bowden is an Associate Professor at the School of Psychological Sciences, University of Melbourne.